Mechanism for opening and closing doors.



No. 892,222. 'PATENTBD JUNE so, 1908. R. P. CAREY.

MEOHANISM FOR OPENING AND CLOSING DOORS.

APPLICATION FILED SBPT.9,1907.

SHEETS-SHEET 1.

le@ l ng No. 892,222. l PATENTED JUNE 30, 1908.

E. F. CAREY. MEGHANISM FOR OPENING AND CLOSING DOORS. APPLIUATION FILEDSEPT. e, 1907. 5 SHEETS-SHEET 2.

110.892,222. PATENTED JUNE so, 1908. 250.22m.

MEGHANISM POR OPENING AND CLOSING DOORS.

APPLICATION FILED SEPT. 9, 1907.

5 SHEETS-SHEET 3.

No. 892,222. PATENTED JUNE 30. 1908.

R. E. CAREY.

MEGHANISM FOR OPENING AND CLOSING DOORS.

APPLIOATION FILED SEPT. 9, 1907.

5 SHEETS-SHEET 4.

Ma/2H No. 892,222. PATENTED JUNE 30.1908. R. E. CAREY.

MEGHANISM FOR OPENING AND CLOSING DOORS.

APPLIOATION FILED SEPT. 9, 1907.

5 SHEETS-SHEET 5.

'Sjoef I: arfy 55 a little raised therefrom, or provided UNITED STATESPATENT OFFICE.

ROBERT FALKLAND CAREY, OF LONDON, ENGLAND, ASSIGNOR TO JOHN HUGH ARBER,OF LONDON, ENGLAND.

Specification of Letters Patent.

Patented June 30, 1908.

Application filed. September 9, 1907. Serial No. 391,977.

To all whom itmay concern:

Be it known that I, ROBERT FALKLAND CAREY, a subject of the King ofGreat Britain, residing at 18 Carlton Terrace, Finchley Road, ChildsHill, London, England, have invented 'certain new and-usefulImprovementsin Mechanism for Opening and Closing Doors, of which thefollowing is a specification.

The object ofmy invention is an improved construction of mechanism,whereby a door or doors, will be automatically opened by the Weight of aperson on a platform on which he steps previous to reaching the door,will re-` main open while the person is still on the platform, andpassing through the doorway, and automatically close after the personhas left the platform.

My invention will bel clearly understood from the following descriptionaided by the accompanying drawings in which Figure 1. is a plan of aplatform and part flooring showing a pair of curved folding doors, andthe door posts in section, the mechanism for operating .the door beingshown in dotted lines. Fig. 2. is a side sectional elevation of same.Fig. 3. is a similar view to Fig. 1, but showing fiat doors and with amodified construction of mechanism for o erating the doors.` Fig. 4. isa side sectiona elevation of Fig. 3, but showing a complete sectionaledge view of the door and its means ofconnection to the top rail of thedoor frame. Fig. 5. is a plan of a platform and part flooring showing apair of flat folding doors with a further modified construction ofmechanism for 'operating the doors. Fig. 6. isa side sectional elevationof Fig. 5. Fig. 7. is a plan of a latform and part of the flooring witha air ofiflat doors in section, the mechanism or operating the doorbeing actuated in one direction electrically by the platform makingcontact while depressed, a sprinO returning the door. Fig. 8. is a sidesectionaI elevation with the doors removed. FiA 9. is a plan of.pneumatic or hydraulic mec ianism for opening the doors, with a s ringto close the doors. Fig. 10. is a side elevation of Fig. 9, showing theplatform and part of the flooring.

For the purpose of my invention, and as shown at Flgs. 1 and 2, Ilarrange within and inside and outside a doorway 1 a platform 2,preferably on a level with the floorin y .3, otr;

wit

mats 4 to give a (greater height, said platform 2 being provide withlugs 5 carrying ins 6 and being held preferably like a scale eam, oncrank levers 7 pivoted to lugs 8 secured to the bottom or sides of therecess 9 formed to receive the platform 2 and the mechanism, each two ofthe bell crank levers 7 being connected by a rod 10. On each rod Iattach a chain 11 which is rove round a pulley 12 formed on ivot 13 ofanextension arm 14 ffrom theoor 15, on which the door is pivoted, thechain 11 being connected to an adjustable spring 16 connected to one ofthe lugs 8 or to t-he recess 9, or to any convenient support.

`he bracket or 'extension 14 on which the bottom of the door is held,extends from the fulcrum or'lpivot 13 under the platform 2 and passes upt irough a slot 17 in the platform 2, the door 15 being connected to theportion above the platform, and a similar construction of extension orbracket 18 with the fulcrum 19 in the same plane as the bottom fulcrum13 is .secured to the door at the upper art of the. door frame 1, sothat the pivot `nges 13 and 19 of the door, see Fig. 4, are central ofthe circle yin which it moves When two doors are em loyed as shown inthe drawings, the crank evers 7 are duplicated, and connected togetherrigidly by a C.

shaft 18, so that the two rods 10 move together, the springs and chainsbeing also duplicated so that the two doorswill move simultaneously, aswill be understood from the drawings.

For two or folding doors, I may provide shields 20 on either side of thedoor post, to form a recess in the door frame, see Fig. 1, for receivingthe doors' when o en, and I may make such doors curved in s ape as atFig. 1 or flat as at Fig. 3.

According to Figs. 3 and 4, I dispense with the springs 16 andsubstitute an arm' 21 carrying weights 22, said arm being fixed to theaxle 18, for effecting the same urpose as the springs, and instead ofemp oying two chains 11,l I only employ one, this being affixed to bothrods 10, and assed round both pulleys 12 for operating t efdoors.

According to Figs. 5 and 6, I dispense with the pulleys and chains, andconnect to arms 14 on the axle 13 two lugs 23,24, the lug 23 beingconnected to the crank lever 7, and the lugs 24 being connected togetherby an adjustable connecting rod 25. The crank lever l OO 7 instead ofbeing pivoted in bearings of the bracket 8 may be mounted on rollers 26to reduce friction, and be held in position by slots 27 of the'brackets8.

The axles 18a are provided with extensions 28, these carrying by links29 a bar'30, which return the platform to elevatedposition. On

the under side of the platform 1s provided a movable contact 31 whichis-arranged to coo erate with the stationary contacts 32 and' c ose anelectrical circuit through a solenoid 33 when theplatform is depressed,the solenoid when energized attracting the movable .armature or core 34and thereby producing `a tension on the flexible operatingchain orelement 11 and causing a simultaneous opening movement of both doors,vThe moment the platform rises, the circuit through the solenoid isbroken by the disengagement of the contacts 31 and 32, and a s ring 18or its equivalent attached to the fiee end of the chain, serves toautomatically return the doors to closed osition.

According to igs. 9 and 10, pneumatic or hydraulic means are employed toopen the doors. The platform is connected to a crank arm 35 pivoted to abracket 36 in the recess, and this crank arni 35 o erates a valve 37which controlsthe supp y of air or liquid from the pipe 38 to the pipe39 for operating the ram 40 to-move the chain 11`to open the doors. Vhenthe'p'latform rises, the valve 37 is returned and closes the supply 38,the air or iiuid escaping by they pipe 4411, this allowing the spring16, which had previously been put in tension, to act on the chain,return the ram and close the doors.

ln action, in' accordance with Figs. 1 to' 6, a person steps on theplatform 2, and his weight lowerssame, this actuating the bell cranks 7,one set for each door 15, and moves the twonrods end on, this pulls ormoves the chainor lugs and opens bothdoorsfthe doors moving in a circle,edge on, from their fulcrums or pivots, at the same time the springs areput in tension or the Weights raised, the person Ipasses over theplatform, and while on the platform, his weight keeps the doorsl opened,but so soon as he leaves the platform, the springs or weights come intoaction, and operating the appliances in a reverse direction, close thedoors and lift the platform.

According to Figs. 7 vand 8, the Weight of the person on the platformcauses electrical contact to be made, sothat the electric current lwillpass to amagnet to move a solenoid, this pulling the chain Whichoperates the doors, and putting tension on the spring, and

l as soon as the person leaves theplatform, the spring will return theplatform and close the doors. f According to Figs. 9 and 10, theoperation is the same except that the platform operates a crank, which1n turn moves a valve to allow air or water, under pressure, to a ramwhich operates the chain.

The fulcrum of the doors may be arranged in ball bearings for ease ofaction.

ln all the figures l have Shown the platform moving on a parallel motionas this gives equal power at whatever part of the platform a person maystand, butin some cases, more especially where electric'pneumatic orhydraulic power is employed, l may make the moving platform hinged on aninoline o-r slope.

In constructing the apparatus, the doors must be made very easy to open,as otherwise the weight of a person on the-platform would not besufficient to open the doors and overcome the resistance of the s ringsor Weight, and by reason of the particu ar pivotin arrangement of thedoor, wind pressure W .not o en the door or doors, as pressure on one sie of one door will be neutralized by that on the other side of the samedoor, and in addition to this advantage, those doors moving in the waydescribed, i. e., in a circle, will not swing in either direction to anygreat extent' towards the face of the person appoaching. hat I do claimand desire to. secure by Letters Patent is 1. In an apparatus of theclass specified, a movable platform, the latter having arcuate slotsytherein, bracketshaving portions/ extending through the slots, a doorhaving the lower extremity thereof engaging and carried by the brackets,and mechanism coperating with the brackets and platform. r

2. The combination with a door, of a platform vertically movable in thepassage-way controlled by the door and operable by the weight of aperson thereon, the platform having arcuate slots therein, bracketshaving portions thereof connected to the lower edge of the door andprojecting throu h the slo'ts, and o eratin means between t e platformand t e brac iets for equalizing the Inovement of the latter whenthe'platform is depressed. p 3. The combination with a door, of aplatform vertically movable in the passage-Way controlled by the doorsand having arcuate slots therein, brackets having arms extending throughthe slots and secured to the lower edge ofthe doors and also rovidedWith pivots carrying pulleys, a liexible operating means coperatinglwith the pulleys of the brackets, and mechanism coacting with theplatform and operatively engaged by the said iiexible means foreffecting a uniform opening movement of the doorswhen the platform isdepressed by the Weight of a perl arranged in the passage-Way of thedoors and son passing thereover.

4, The combination with movably mounted doors, of a platform,arranged inthe passage-way controlled by 4said doors and provided with oppositearcuate slots, al'ms connected to the lower edges of the doors andextending through the platform and provided with pivots below theplatform, pulleys carried by the pivots, supporting devices formaintaining the platform in horizontal posi tion and permitting verticalmovement.

thereof, a flexible operating element engag ing the pulleys foreffecting simultaneous movement of the. doors, and means Vfor restoringthe doors to closed position when'the platform is free to return to itsnormal horizontal osition.

5. 'l ie combination with a pair of coperating doors, of verticallymovable platforms l l l l l l l extending in front and rear thereof, theone )latl'orm having arcuate slots therein, angular brackets havingportions extending upwardly through the said slots and secured lto thelower edges of the doors and also provided With pivots, pulleys carriedby portions ol' the brackets, movable supporting means arranged beneathand coactlng with the platforms and provided with unifying connectingdevices, and flexible means engaging the said pulleys and cooperatingwith the connecting eviees.

In testimony whereof I havehereunto set my hand in presence of twosubscribing witt nesses.

ROBERT FALKLAND CAREY. Witnesses:

RICHARD CORE GARDNER, LYNWOOD F. GARDNER.

